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    <title>Document</title>


    <style>
        #header {
            background-color: black;
            color: white;
            text-align: center;
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        #nav {
            line-height: 30px;
            background-color: #eeeeee;
            height: 300px;
            width: 100px;
            float: left;
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        #section {
            width: 350px;
            float: left;
            padding: 10px;
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        #footer {
            background-color: black;
            color: white;
            clear: both;
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            padding: 5px;
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<body>
    <div id="header">
        <h1>头部位置</h1>
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        小标签<br>
        小小签<br>
        小签小<br>
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    <div id="section">
        <h1>主题</h1>
        <p>
            我也不知道该写点啥，有啥写点啥吧，不如写点英文Standing on the River Thames, London has been a major settlement for two millennia,
            its history going back to its founding by the Romans, who named it Londinium.
        </p>
        <p>
            我也不知道该写点啥，有啥写点啥吧，不如写点英文Standing on the River Thames, London has been a major settlement for two millennia,
            its history going back to its founding by the Romans, who named it Londinium.
        </p>
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        Copyright W3School.com.cn
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